55140662461 has 4 divisors (see below), whose sum is σ = 57538082592. Its totient is φ = 52743242332.

The previous prime is 55140662459. The next prime is 55140662497. The reversal of 55140662461 is 16426604155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55140662461 - 2¹ = 55140662459 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55140662431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198710031 + ... + 1198710076.

It is an arithmetic number, because the mean of its divisors is an integer number (14384520648).

Almost surely, 2^55140662461 is an apocalyptic number.

It is an amenable number.

55140662461 is a deficient number, since it is larger than the sum of its proper divisors (2397420131).

55140662461 is a wasteful number, since it uses less digits than its factorization.

55140662461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397420130.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 55140662461 in words is "fifty-five billion, one hundred forty million, six hundred sixty-two thousand, four hundred sixty-one".